Porks bike carbs and boost project

[pork]

..........and did it work?







Houston, we have idle !

 

[MicrAde]

Nice one Neil Now get that bloody turbo sorted!

 

[pork]

Hahah, yes!!!!!!


One last hurdle before that.....where to mount this bloody pump! Only space left is the battery tray which means moving the battery


I'm mega chuffed tho now it runs, still sounds bit rough!


Thanks to everyone who's helped, greatly appreciated!!!

 

[l_jonez]

..........and did it work?







Euston, we have idle !

 

[l_jonez]

I'm mega chuffed tho now it runs, still sounds bit rough!

i found that once i had a wideband installed it allowed me to set the idle screws much easier, just make sure you keep them all the same same amount of turns out

 

[pork]

i found that once i had a wideband installed it allowed me to set the idle screws much easier, just make sure you keep them all the same same amount of turns out

Will do mate

 

[pork]

Mounted pump today, temporarily for now

 

[karlj]

Looks good, will your bumper fit back on?

 

[pork]

Sort off, needs some 'adjustment'

Not to bothered right now, jus wanna get it driving. Then sort out how it looks.

Function over form

 

[pork]

Pump all wired up, plumbed in, managed to feed return into dipstick hole too

Had a quick test earlier, pump works a treat, but engine is only running on 3 cylinders.

Looking at engine from front off the car, it's the cylinder on the left, (1 or 4 )

Then started lashing it down so couldn't find out why.

Can someone chuck ideas for me to look at when the heavens have stopped pissing down

 

[frank]

did you check the tappets neil ?

 

[pork]

did you check the tappets neil ?

Not yet, would that have something to do with it?

Also, I have new plugs and leads

 

[frank]

if its idling on 3 and then running on 4 at higher revs, then one of the tappets may have no clearance mate

 

[pork]

Ok, il check that tomorrow, only had it idling for a while, and it sounded rough, checked the primaries and that runner was cold, pulled the lead out and no change in engine tone............then started raining so couldn't investigate further

 

[MicrAde]

Ok, il check that tomorrow, only had it idling for a while, and it sounded rough, checked the primaries and that runner was cold, pulled the lead out and no change in engine tone............then started raining so couldn't investigate further

While you had ht lead off did you check for a spark at that lead?

 

[pork]

While you had ht lead off did you check for a spark at that lead?

Didn't get a chance unfortunately.

 

[MicrAde]

Didn't get a chance unfortunately.

Ha ha, high voltage and pissing rain!

 

[padraicR]

ha yeah high voltage and pissing rain
there the type of combination that always ends with " i told ya so! "

 

[MicrAde]

Even I resisted the temptation to say "whats the worst that could happen"

 

[pork]

Also forgot to mention, boost/vacuum gauge is very erratic! Unless kept at higher revs. I guess that's down to the dead cylinder?

 

[pork]

I've got spark, I've adjusted tappets, cleaned carbs the other day, so what else can I check?

 

[superls]

change the plug, have you def got spark at that cylinder?
is the plug wet?

 

[pork]

All new plugs/leads, I checked spark by putting plug in lead and turning engine over whilst plug was on metal. Saw spark ok.

 

[superls]

qwhen other 3 are running stop engine, whip the plug out and see if its wet

 

[pork]

Figured it out

Dodgy lead, was fine when I took plug out, would get spark off bare metal ok.

Brand new too. I've had carbs taken to bits, compression tested it, changed all plugs about, and then accidentally come across the answer.

Here's a video of it running.

What does the needle jumping on boost/vac gauge mean!?!
It settles down again onced revved, then goes mental

 

[MicrAde]

Just out of interest what were your compression readings?

 

[frank]

the boost gauges are usually dampered neil (very fine hole inside) you might need a receiver of some sort if you have 4 vacuum pipes into 1 ?

 

[pork]

Just out of interest what were your compression readings?

All above and between 150-160. Quite even really.

 

[frank]

All above and between 150-160. Quite even really.

thats good readings for a 20yr old (lower comp) 1.2 mate

 

[pork]

the boost gauges are usually dampered neil (very fine hole inside) you might need a receiver of some sort if you have 4 vacuum pipes into 1 ?

I'm only using 6mm piping along between the vac take offs, then onto brakes, do you reckon if Increased the size of pipe it will be better?

 

[pork]

thats good readings for a 20yr old (lower comp) 1.2 mate

Haha, at least something is good on it!

There is a bit of smoke coming from rocker breather tho :/

 

[pork]

thats good readings for a 20yr old (lower comp) 1.2 mate

Haha, at least something is good on it!

There is a bit of smoke coming from rocker breather tho :/

 

[frank]

I'm only using 6mm piping along between the vac take offs, then onto brakes, do you reckon if Increased the size of pipe it will be better?

you may need a vacuum tank from a diesel neil, or try a restictor or 2 in the piping

 

[l_jonez]

When using 4 runners connected together you need to dampen the pulses. I used a small valve for a for a fish tank air line (happend to be 6mm) and I put it in line and slowly closed it untill it read a constant value.

Like this one

 

[pork]

When using 4 runners connected together you need to dampen the pulses. I used a small valve for a for a fish tank air line (happend to be 6mm) and I put it in line and slowly closed it untill it read a constant value.

Like this one

Hmmm, may ave to construct something like that

 

[l_jonez]

The other people have used is a fuel filter with the element removed which then acts as a small reservoir and dampens the pulses.

Like this

Both work well from what I've read

 

[superls]

you need to restrict the puipe to the dial to stop it doin that, i just pinched the pipe on mine to stop it,

 

[pork]

Been for first spin in car today

Drives fine, jus losses power as the turbo comes on..

Boost gauge is at 0,

I've done nothing to ignition timing yet, is that the problem

Is it a fueling issue I've messed up?

Aarrrrgghhhh

 

[frank]

you should be showing boost neil, even if its holding back/leaning out while its boosting

 

[pork]

you should be showing boost neil, even if its holding back/leaning out while its boosting

What do you suggest mate?
Turbo to big?

 

[frank]

What do you suggest mate?
Turbo to big?

any exh mani leaks mate ?

 

[pork]

any exh mani leaks mate ?

Not that I can tell, possilby a couple of pin hole ones (I have made it after all!)

I haven't hooked up rev counter yet, so no idea of revs, but defiantly not at redline, and the power jus stops and car sort of splutters a bit.

Could it be BOV opening to early?

If FPR isn't working right and fuel is getting blown back out of carbs, would the power fade like ths?

 

[frank]

Not that I can tell, possilby a couple of pin hole ones (I have made it after all!)

I haven't hooked up rev counter yet, so no idea of revs, but defiantly not at redline, and the power jus stops and car sort of splutters a bit.

Could it be BOV opening to early?

If FPR isn't working right and fuel is getting blown back out of carbs, would the power fade like ths?

the bov should only open when you lift eh neil (run without it if you want) and expect a right mission getting the carbs to fuel properly under boost eh

 

[pork]

the bov should only open when you lift eh neil (run without it if you want) and expect a right mission getting the carbs to fuel properly under boost eh

Haha, yep, and so it begins

Never drove turbo car before, was so excited waiting for boost, anti climax to say the least

 

[pork]

Just to make sure, boost signal to FPR goes to intake manifold, not the plenum?

 

[frank]

Just to make sure, boost signal to FPR goes to intake manifold, not the plenum?

best to use a vacuum log really neil, and run your pipes to it

 

[pork]

best to use a vacuum log really neil, and run your pipes to it

Ok, will do, but the pipe that goes to regulator comes from the manifold?

 

[frank]

Ok, will do, but the pipe that goes to regulator comes from the manifold?

yes all your vacuum pipes go post throttleplate,s/butterfly,s eh mate you will have some positive pressure upstream of them at times when there is no actual boost eh

 

[pork]

yes all your vacuum pipes go post throttleplate,s/butterfly,s eh mate you will have some positive pressure upstream of them at times when there is no actual boost eh

Cheers mate

Got a few small manifolds at work to knock something up for all vacuum lines

 

[sr20bud]

sounds like the exact same problem i had although your running bike carbs and i was running the standard carb. my intake boost pipe was completetly sealed and there was no boost what so ever. i know my fueling was probably a big factor but there should of been at least a bit of boost there but nothing lol. all i got was a lot of woosh tish.... but no power. have you checked a few of the bike forums neil? ive seen loads of boosted bikes running carbs but im fairly sure they seal the carbs in a box.